UMG Button stuck in Normal style in 4.25.1

I have a UMG UI on a widget component which is part of the environment. In 4.25.0 hovering over a button with the mouse cursor produced the expected effect. However after updating to 4.25.1 the button remains in the Normal state all the time: the hover and pressed styles never kick in. The functionality is still there fortunately, I get the hover, pressed, etc events, only the visuals are broken.
Any tips on how to fix it?

I’m having a similar problem but it’s only with the hover state.

Weirdly it fixed itself without me touching anything. o_O